Instead of using fixed constants, set them by the following formula from
the current sync to allow good performance of the servo even when the
sync interval changes in runtime and to avoid instability.
kp = min(kp_scale * sync^kp_exponent, kp_norm_max / sync)
ki = min(ki_scale * sync^ki_exponent, ki_norm_max / sync)
The scale, exponent and norm_max constants are configurable. The
defaults are chosen so there is no change to the previous default
constants of the servo with one second sync interval. The automatic
adjustment can be disabled by setting the pi_proportional_const and
pi_integral_const options to a non-zero value, but stability of the
servo is always enforced.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
This patch adds support for using the configured_pi_f_offset servo option to ptp4l.
If "pi_f_offset_const 0.0" is specified in the config file, stepping on the first
update is prevented. If any other positive value is specified, stepping on the
first update occurs when the offset is larger than the specified value.
change since v1
- add the new option to default.cfg and gPTP.cfg
Signed-off-by: Ken ICHIKAWA <ichikawa.ken@jp.fujitsu.com>
Fix the check for supported timestamping modes. The device needs
to support all the required modes, not just any subset of them.
Signed-off-by: Jiri Bohac <jbohac@suse.cz>
The option sets an additional limit to the hardware limit. It's disabled
if set to zero. The default is 900000000 ppb.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
This patch modifies sk_receive in order to use poll() on POLLERR instead of the
tryagain loop as this resolves issues with drivers who do not return timestamps
quickly enough. It also resolves the issue of wasting time repeating every
microsecond. It lets the kernel sleep our application until the data or timeout arrives.
This change also replaces the old tx_timestamp_retries config value with
tx_timestamp_timeout specified in milliseconds (the smallest length of time poll
accepts). This does have the side effect of increasing the minimum delay before
missing a timestamp by up to 1ms, but the poll should return sooner in the
normal case where a packet timestamp was not dropped.
This change vastly improves some devices and cleans the code up by simplifying a
race condition window due to drivers returning tx timestamp on the error queue.
[ RC - removed the unused 'try_again' variable. ]
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Add kernel_leap option for ptp4l and -x option for phc2sys to disable
setting of the STA_INS/STA_DEL bit to slowly correct the one-second
offset by servo.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
New clock options should go into 'struct default_ds' so that we can avoid
growing clock_create indefinitely.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Add new options to ptp4l and phc2sys to print summary statistics of the
clock instead of the individual samples.
[ RC - Fix () function prototype with (void).
- Use unsigned for sample counter.
- Fix over-zealous line breaks. ]
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Adds struct containing clock description info that will be needed for
USER_DESCRIPTION and CLOCK_DESCRIPTION management messages.
Signed-off-by: Geoff Salmon <gsalmon@se-instruments.com>
The printing facility is used by different programs, allow to set the
program name which prefixes the messages written to stdout.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
A timeout of 15 seconds is not always acceptable, make it configurable.
By popular consensus, instead of using a linear number of seconds, use
the 2^N format for the time interval, just like the other intervals in
the PTP data sets. In addition to numeric values, let the configuration
file support 'ASAP' to have the fault reset immediately.
[RC - moved the handling of special case tmo=0 and added a break out
of the fd event loop in case the fds have been closed.
- changed the linear seconds option to log second instead.
- changed the commit message to reflect the final version. ]
Signed-off-by: Delio Brignoli <dbrignoli@audioscience.com>
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Reforming the data structure in this way will greatly simplify the
implementation of the management message for this data set.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
The Linux kernel supports a hardware time stamping mode that allows
sending a one step sync message. This commit adds support for this mode
by expanding the time stamp type enumeration. In order to enable this
mode, the configuration must specify both hardware time stamping and set
the twoStepFlag to false.
We still do not support the one step peer delay request mechanism since
there is neither kernel nor hardware support for it at this time.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
this patch uses the new sk_get_ts_info data to check whether the selected
timestamping mode is supported on all ports. This check is not run if the port
data isn't valid, so it will only fail if the IOCTL is supported. This allows
for support of old kernels that do not support the IOCTL to still work as expected.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
this patch changes sk_interface_phc to sk_get_ts_info, by allowing the function
to store all the data returned by Ethtool's get_ts_info IOCTL in a struct. A new
struct "sk_ts_info" contains the same data as well as a field for specifying the
structure as valid (in order to support old kernels without the IOCTL). The
valid field should be set only when the IOCTL successfully populates the fields.
A follow-on patch will add new functionality possible because of these
changes. This patch only updates the programs which use the call to perform the
minimum they already do, using the new interface.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
- fail on unknown options, bad values and other syntax errors
- fail with more than MAX_PORTS ports
- remove implicit global section
- add error messages
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Now that the code automatically falls back to transport-specific time
stamping, this option is no longer needed.
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Jiri Benc <jbenc@redhat.com>
Make it easier to find out the compiled-in defaults in the code
and set all options in default.cfg.
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
this patch modifies the pi servo to add a configurable max offset (default
infinity). When ever the detected offset is larger than this value, the clock
will jump and reset the servo state. The value of this feature is for decreasing
time to stabalize when clock is off by a large ammount during late running. This
can occur when the upstream master changes, or when the clock is reset due to
outside forces. The method used to reset clock is simply to reset the pi servo
to the unlocked state.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
this patch causes interfaces to be built after the options have finished
scanning rather than during option parsing. This removes the ability to
specify on the command line separate transport, or dm modes for each port.
Instead this functionality will be added in a follow-on patch via the
configuration file
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
This patch moves the call to read the configuration file until just after
the options have finished parsing. This is for future patches that will allow
configuration file to enable ports with specific settings
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
This patch adds a flag field for setting overflag flags so that command line
options override any value in the configuration file. This will be done by
ensuring the flags set whether the config parser accepts the values specified.
This patch also streamlines the handling for the slave only command line
option, as it no longer needs special treatment.
-v2
* Minor change to fix merge with previous patch
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
This patch adds support to the configuration file for all of the options
specified on the command line.
-v2
* Fix string length to account for null byte
* Add PRINT_LEVEL_MIN/MAX defines
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
this patch allows each port to maintain its own pod structure since it is only
used in ports. This will allow the user to configure any special settings per
port. It takes a copy of the default pod, and a future patch will allow the
configuration file to set per-port specific changes
-v2
* Minor change to fix merge with previous patch
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
this patch adds a support function that creates a new port based on the
current default settings and adds it to the iface list. The function returns
the index into the cfg where the port was created. If a port is attempted to
be created multiple times, future attempts just return the index
-v2
* Move assignment of pointer into array after bounds check
[ RC - fix off by one return code from config_create_interface ]
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
In order to support future settings which allow for the configuration of
per-port data, this patch modifies the interface name to be a static array
instead of a pointer.
-v2
* Minor edit for merge with previous patch
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
move the dm, timestamping, and transport settings into the cfg_settings, and
treat them as defaults for new ports.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
make ds and pod static inside cfg_settings instead of created via pointers.
Also statically initialize the defaults.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
this patch modifies the ptp4l.c and config settings so that the iface list is
inside the cfg_settings structure
-v2
* Moved "struct interface" into config.h
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
The current code for the timestamping mode does not allow interfaces to have
separate timestamping modes. This is (probably) due to hardware timestamping
mode being required on all ports to work properly.
This patch removes the timestamping field in the struct iface, and makes it a
clock variable which is really what the mode does anyways. Ports get passed
the timestamping mode but no longer appear as though they are separate.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
this patch updates the global set functions to allow the user to set the
proper value instead of only being allowed to enable (or disable) a particular
feature. The new patch allows the function to specify exactly what they want
the value to be.
This patch also clarifies what -q and -v do by removing mention of quiet mode
and verbose mode. It is easy for a user to confuse and assume that -q disables
-v when this is not true.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Miroslav Lichvar
Richard Cochran
Ken ICHIKAWA
Jiri Bohac
Jacob Keller
Delio Brignoli
Geoff Salmon